Chain-guiding mechanism for tentering-machines



(No Model.)

D. BABGOGK. CHAIN GUIDING MEGHANISM FOR TENI'ERING MACHINES.

No. 469,221. Patented Feb. 23, 1892.

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UNITED: STATES PATENT OFFICE.

DARIUS BABCOCK, OF MERIDENpCONNEOTICUT.

CHAIN-GUIDING MECHANISM FOR TENTERING-MACHINES SPECIFICATION forming part of Letters Patent No. 469,221, dated February 23, 1892.

Application filed August 24,1891. Serial No. 403,530. (No model To all whom, it may concern.-

Be it known that I, DARIUS BABCOCK, a citizen of the United States, residing at Meriden, in the county of New Haven and State of Cons necticut, have invented certain-new and useful Improvements in Chain-Guiding Mechanism for Tentering-Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

In the accompanying drawings, Figure 1 represents a plan View of a section of a chain and guide-rail, and also the adjusting-brackets, and serves well to illustrate the spirit and scope of my invention. Fig. 2 is a transverse sectional view taken through the line X, Fig. 1.

This invention relates to improvements in that classof tentering-machines in which the fabric is stretched between two chai us, which travel at a uniform rate of speed and operate one on each side of the machine. It is most closely allied to that class of tentering-machines which are employed for the manufacture of shade-cloth, but, as will be readily understood, can be used with equal advantage upon the ordinary drying-machines.

The objectof this invention is to provide a simple, cheap, durable, and efficient means for guiding the chain, which at the same time shall permit of ready and easy adjustment in setting up or building the machine or straightening the rail when the occasion requires.

Heretofore machines of a similar character have been provided with solid brackets admitting of no adjustment, therefore causing great difficulty in the erection of the machines and otherwise proving unsatisfactory. The brackets b'eingmounted upon awooden frame, which,owin g to its susceptibility to the changes of the atmospherei. 6., dryness and dampness-the rail soon became out of true, with no means of straightening it, thereby often causing serious damage to the production of the machine, since in this class of machines it is of the utmost importance that the chains should run perfectly parallel with each other in order to produce perfect goods.

In the drawings, A is a bracket, which is fastened to the frame-work of the machine, and a is a roll mounted therein and over which the chain passes when in motion.

B represents the studs or rivets by which the side bars of the links are secured together.

0 is a bracket secured to theinside of one of the side bars, and ois a roll mounted in the same. On the outside of the opposite side bar is secured the tenter-hooks, (designated by the letter D.) An arm or bracketE is secured to the top of the bracket A by means of a screw-threaded bolt, which passes through the elongated slot e in the bracket E. The guide-rail G is secured in any well-known manner to the outer end of the bracket E, as shown. It-is obvious that the guide-rail maybe easily and readily straightened, should it from any cause whatever become out of true, by simply loosening the bolt F and moving the bracket transversely in the proper direction and again securing it in place by tightening the bolt or screw.

The operation of the device is as follows: \Vhentheclothisstretchedbetweenthechains, they are drawn toward the center of the machine until the rolls a engage or contact with the guide-rail G. Therefore it will be seen that unless the guide-rails are perfectly parallel the cloth would become stretched at certain points when drying, thereby causing serious damage to the production, all of which can be quickly and perfectly remedied by the use of the adjustable guide-rail in the manner hereinbefore described. Therefore,

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. As an improvement in chain-guiding mechanism. for tentering-machines,.the combination, with a bar-link sprocket-chain the outer links of which are provided with inwardly-projecting rolls, of a horizontal guidetrack projecting downwardly between the inner links of the chain and the rolls and forming a bearing-surface for the latter, and brackets carrying said track and provided at their secured ends with an elongated slot through which the securing-bolt is passed, substantially as and for the purpose set forth.

2. As an improvement in chain-guiding mechanism for tentering-machines, the comtherefrom, of a bar-link sprocket-chain supbination, with supporting-brackets A, formed I ported upon the rolls a, and rolls c, carried with an approximately-U shaped arm, rolls a, by the outer links of the chain and adapted journaled in the vertical portions of the latto bear against the track, substantially as and I 5 5 ter, overhanging brackets E, arranged paralfor the purpose set forth.

lel with the brackets A and provided in their In testimony whereof I affix my signature in secured ends Withan elongated slot 6, adapted presence of two witnesses.

for the reception of a securing-bolt for bind- DARIUS BABCOOK. ing the bracketsA and E together, and a hori- Witnesses:

1o zontal track G, secured to the free overhang- I A. L. OTIS,

ing ends of the brackets E and depending MINNIE POWERS. 

